The first installment in the Underworld film series, this 2003 action-horror flick tells the secret history of Vampires and Lycans. The main plot revolves around Selene (Kate Beckinsale), a vampire who is a Death Dealer hunting Lycans. She finds herself attracted to a human, Michael Corvin (Scott Speedman), who is being targeted by the Lycans. After Michael is bitten by a Lycan, Selene must decide whether to do her duty and kill him or go against her clan and save him.